JPH0244482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a universal joint unit whose input side is connected to a power take-off shaft provided at the rear of the body of a tractor. The present invention relates to an improvement in a connection and coupling device for a rotary power transmission mechanism between a tractor and a working machine, for releasably connecting and connecting it to the shaft end of an input shaft of a rotating working part of a working machine.

A work in which a working machine, which is formed separately from the body of a tractor, is set in such a state that its rotating working part is driven by the rotational power transmitted from the power take-off shaft of the tractor through a universal joint unit. The machine is assembled to the rear of the tractor body so that it can move freely when the tractor is running, and then connects the input side to the tractor's power take-off shaft (PTO shaft). This is done by pulling out the shaft end of the output shaft of the universal joint unit and connecting it to the shaft end of the input shaft installed on the body of the work machine. The work of connecting the shaft end to the input shaft of the work equipment is performed by an operator in a narrow and limited area between the tractor and the work equipment or between the structure of the work equipment connected to the tractor. This is an extremely difficult task as it involves holding and holding a universal joint unit in one's hands while pulling out the shaft end of the output shaft and fitting it to the shaft end of the input shaft of the working machine.

Furthermore, as stated in Japanese Utility Model Application Publication No. 55-123205, the output side shaft end of the universal joint shaft connected to the tractor's PTO shaft is assembled to the rear of the tractor body using a three-point hitch. The work equipment is rotatably supported on the supported work equipment mounting machine frame, and between the protruding end of the shaft end and the protruding end of the input shaft on the work equipment side provided in the body of the work equipment, there is a A clutch is provided that connects when the work equipment approaches, and a clamp mechanism is provided between the work equipment mounting frame and the body of the work equipment that engages when the work equipment approaches in the front and back direction.
By moving the work equipment mounting frame toward the work equipment body by driving the tractor, and connecting the work equipment mounting frame and the work equipment body through the engagement of the clamp mechanism, the universal joint is simultaneously connected by the clutch. A method has been proposed for connecting the output shaft of the int unit to the input shaft of the working machine, but this method requires a universal joint because the clutch is configured to match the clamp mechanism with large play. Another problem arises in that the connection between the output shaft of the unit and the input shaft of the work equipment becomes uncertain.

The present invention has been made in order to solve these problems occurring in conventional means, and it has been made to
The output shaft of the universal joint unit and the input shaft of the work equipment are moved forward and backward relative to the shaft end of the input shaft of the work equipment connected to the tractor, and the input shaft of the universal joint unit and the input shaft of the work equipment are reliably engaged and removed. The purpose of the present invention is to provide a new means for safely, easily, and quickly engaging and disengaging the shaft.

In the present invention, as a means for achieving this object, the shaft of the output shaft of a universal joint unit that extends and contracts in the axial direction, the input side of which is connected and transmitted to the power take-off shaft provided at the rear of the body of the tractor. The outer peripheral side of the end portion is rotatably held by a movable holding member via a bearing, and the holding member is fixed to a work equipment mounting frame that is mounted on the rear body of the tractor so as to be movable up and down. The guide frame to be supported is fitted so as to slide along the axial direction of the output shaft and enter and exit the tractor body in the front and back direction, and the rear body of the tractor is secured by a coupling frame that connects with the work equipment mounting frame. An input shaft is installed on the front side of the machine body of the work machine to be connected and mounted to the work machine mounting machine, and the input shaft is installed so as to fit and connect with the shaft end of the output shaft of the universal joint unit. A tractor which is mounted on the body of the working machine at a position facing the shaft end of an output shaft which is pivotally supported by a holding member that slides back and forth by the guide frame when connected to the frame. This invention proposes a coupling device for a rotary power transmission mechanism between working machines.

Next, embodiments will be described in detail with reference to the drawings.

In Fig. 1, A is a conventionally known four-wheel tractor, 1 is a power take-off shaft (PTO shaft) installed on the rear surface of the body a of tractor A, and 2 is a shaft end on the input side connected to the power take-off shaft 1. The universal joint unit 3 is a work equipment mounting frame that is assembled and mounted on the rear side of the tractor A's body a so that it can be raised and lowered by a three-point support mechanism consisting of a lower link 30 and a top link 31. The lift arm 4 installed at the rear of the aircraft body a is linked to the lift arm 4 for lifting and lowering operations by rotating the lift arm 4 up and down using a hydraulic system. Further, reference numeral B designates a working machine that is attached to the rear part of the machine body a of the tractor A by assembling and coupling a coupling machine frame 50 provided at the front end of the machine body b to the work machine mounting machine frame 3. This is a plow 51 that performs a plowing action by being towed by A, and is equipped with a rotary earth crusher 52 that shreds the soil plowed by the plow 51.

The universal joint unit 2, in which the shaft end 10 on the input side is connected and coupled to the power take-off shaft of the tractor A, is connected to the shaft end 20 of the output shaft 20 thereof.
The outer peripheral side of a is rotatably supported by a cylindrical holding member 6 via a bearing 60 (FIG. 2). The holding member 6 holds the output shaft 20 as follows:
engaged with the output shaft 20 in its axial direction;
By moving the holding member 6 in the axial direction of the output shaft 2, the output shaft 20 is allowed to move freely together with the holding member 6. A guide 61 extending along the axial direction of the output shaft 20 is formed on the outer surface of the holding member 6. In the embodiment, as shown in FIG. 3, the guide 61 covers both left and right sides of the holding member 6.
Although it is formed to bulge out in the shape of a rail, it may be formed as appropriate. The holding member 6 is fitted into a guide frame 7 that is fixedly supported on the work implement mounting frame 3, which is mounted on the body of the tractor A so as to be able to rise and fall freely, and is slid in the axial direction of the output shaft 20. The person will be guided and guided to move. Holding member 6 by this guide frame 7
is guided by the shaft end 2 of the output shaft 20 of the universal joint unit 2 held by the holding member 6 via the bearing 60 by the movement of the holding member 6.
0a is moved in the front-rear direction to operate it to advance and retreat with respect to the input shaft 53 provided on the body b of the work machine B connected to the work machine mounting frame 3, thereby increasing the output of the universal joint unit 2. The shaft end 20a of the shaft 20 is connected to the input shaft 53 of the work machine B.
The shaft end 20 of the output shaft 20 that is fitted into the input shaft 53 is connected and connected.
a to escape from the input shaft 53 to release the connection, and its guiding direction is the same as the direction of the axis of the input shaft 53 supported by the body b of the working machine B. However, in this embodiment, the setting is made so that the guide is correctly guided back and forth along a horizontal plane.

The above-mentioned input shaft 53 is attached to the body b of the work machine B for driving the rotary earth crusher 52 which is the rotary working part thereof.
, a coupling machine frame 50 provided at the front end of machine body b is joined to a work implement attachment machine frame 3 mounted on machine body a of tractor A, and a toggle clamp 32 etc. is installed between these machine frames 3 and 50. The machine frames 3 and 50 are connected by the removable connecting fittings of
The holding member 6 is fitted into the guide frame 7 mounted on the work equipment mounting frame 3 in a state in which the holding member 6 is connected and attached to the body a of the tractor A in a workable state.
The shaft end 20a of the output shaft 20 held by
and are arranged on the front surface of the fuselage b so that their axes coincide and face each other.

8 is a working mechanism for slidingly moving the aforementioned holding member 6 in the axial direction of the output shaft 20; in this example, a bracket 70 provided on the guide frame 7;
It is a handle whose base end side is rotatably supported via a support shaft 80, and an extending portion 81 extending downward beyond the support shaft 80 is inserted through an elongated hole 82 and a connecting pin 83. and is connected to the holding member 6. The operating mechanism 8 formed on the handle pushes out the holding member 6 rearward by rotating in the direction of the arrow A in FIG. 3 about the support shaft 80.
Rotating in the direction of arrow B in the figure acts to pull the holding member 6 toward the tractor A side. The actuation mechanism 8 may be designed as appropriate, such as by changing it to a hydraulic actuation mechanism such as a hydraulic cylinder.

In the illustrated embodiment, reference numeral 22 denotes a fastener 33 that locks the shaft end 20a of the output shaft 20 of the universal joint unit in that state when it is fitted to the input shaft 53 of the working machine B; teeth,
Reverse the body of tractor A and attach the work equipment frame 3
, the coupling machine frame 50 provided on the machine body b of the work machine B
This is a connection guide provided on the work equipment mounting frame 3 so that the height position is automatically aligned when it is joined to the front surface of the work equipment mounting machine (mast).

The embodiment device constructed in this manner operates as follows.

A work machine B is installed at the rear of the body of the tractor A, and the input shaft 53 of its rotary working part is driven by the rotational power transmitted from the power take-off shaft 1 of the tractor A through the universal joint unit 2. When connecting and mounting, first move the machine body a of tractor A backwards, and attach the work equipment mounting frame 3 mounted on the rear of it to the coupling machine frame (mast) mounted on the front end of the machine body b of work machine B. ), the machine frames 3 and 50 are connected by a connecting fitting, and the work machine B is connected and mounted on the machine body a of the tractor A in a state where it can be operated. As a result, the shaft end 20a of the output shaft 20 of the universal joint unit 2 whose input side is connected to the power take-off shaft 1 of the tractor A is
A holding member 6 that pivotally supports the outer peripheral side of the work equipment B is regulated by fitting with a guide frame 7 that is fixedly installed in the front and back direction on the work equipment mounting frame 3 provided on the machine body a of the tractor A. The shaft end of the input shaft 53 faces the shaft center line with the shaft center line aligned, and at the same time,
By sliding the holding member 6 with respect to the guide frame 7, the holding member 6 moves forward and backward with its axial center line aligned with the shaft end of the input shaft 53.

Next, when the holding member 6 is moved rearward from this state by an appropriate actuation mechanism, the output shaft 20 held by the holding member 6 is pushed rearward along with the holding member 6 along its axis. go. At this time, the movement of the holding member 6 is regulated by the guide frame 7, so that the output shaft 20 is pushed backward.
moves along its axial center line correctly, and it comes to fit correctly into the input shaft 53 of the working machine B that is facing it. Then, in this state, the fastener 22 is tightened to complete the connection work.

Therefore, the holding member 6, which is slidably supported by the guide frame 7 fixedly mounted on the work equipment mounting frame 3 provided on the machine body a of the tractor A, can be simply slid rearward under the guidance of the guide frame 7. In operation,
Output shaft 20 of universal joint unit 2
to the input shaft 53 of the work machine B, and conversely, by moving the holding member 6, the output shaft 20 fitted and connected to the input shaft 53 of the work machine B is connected to the input shaft. You will be able to extract it from 53.

As explained above, the connection and coupling device of the rotary power transmission mechanism between a tractor and a working machine according to the present invention is provided in the axial direction in which the input side is connected to the power take-off shaft 1 provided at the rear of the body a of the tractor A. The outer peripheral side of the shaft end 20a of the output shaft 20 of the extensible universal joint unit 2 is rotatably held on a shaft rack by a movable holding member 6 via a bearing 60. Aircraft a
A guide frame 7 fixedly supported by a work equipment mounting frame 3 mounted at the rear so as to be movable up and down is configured to slide along the axial direction of the output shaft 20 and move in and out of the body a of the tractor A in the front-rear direction. The output shaft 20 of the universal joint unit 2 is attached to the front side of the body b of the work machine B which is connected to the rear of the machine body a of the tractor A by means of the coupling machine frame 50 which is fitted and connected to the work machine mounting machine frame 3. An input shaft 53 installed to fit and connect with the shaft end 20a of the input shaft 53 is slid back and forth by the guide frame 7 in a state where the coupling frame 50 is coupled to the work implement mounting frame 3. Since the output shaft 20 is mounted on the body b of the working machine B at a position opposite to the shaft end 20a of the output shaft 20 which is pivotally supported by the holding member 6, it can be attached to the body a of the tractor A. If the connecting machine frame 50 provided on the machine body b of the working machine B is connected to the provided work equipment mounting frame 3, and the working machine B is connected and mounted on the tractor A, from that state, the tractor A side By sliding the holding member 6, which is slidably supported in the front-rear direction on a guide frame 7 that is fixedly supported on the work equipment mounting machine frame 3 of The shaft end 20a of the output shaft 20 of the universal joint unit 2 which is mounted on the shaft
However, due to the restriction of the guide frame 7, the input shaft 53 of the work machine B
With respect to the shaft end of the output shaft 20, its axis center line and the output shaft 20
The shaft end 20a of the input shaft 53 is aligned with the axial center line of the input shaft 53, and the holding member 6 is fitted onto the shaft end of the input shaft 53. By sliding the universal joint unit 2 forward, the shaft end 20a of the output shaft 20 of the universal joint unit 2, which had been fitted to the input shaft 20 of the working machine B, comes to come out from the input shaft 20. The connection between the output shaft end of the universal joint unit and the input shaft of the working machine connected to the tractor is now released. Therefore, while ensuring that the shaft end of the output shaft 20 of the universal joint unit and the input shaft 53 provided on the body b of the working machine B are engaged and disengaged, the engagement and disengagement work can be done safely and easily. , can be done quickly.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of an embodiment of the device of the present invention, Fig. 2 is a longitudinal cross-sectional side view of the main parts of the same device, Fig. 3 is a perspective view of the main parts of the same device, and Fig. 4 is the operation of the same device. FIG. 3 is a perspective view of a machine mounting machine frame. Explanation of drawing symbols, A...tractor, a...body, 1...power take-off shaft, 10...input side shaft end, 2...universal joint unit, 2
0... Output shaft, 20a... Shaft end, 22... Fastener, 3... Work equipment mounting machine frame, 30... Lower link, 31... Top link, 32... Toggle clamp, 33... Connection guide, 4... Lift arm, B... Working machine, b... Body, 50... Connecting machine frame, 51... Plow, 52... Rotating earth crusher, 53
...Input shaft, 6...Holding member, 60...Bearing, 6
1...Guide, 7...Guide frame, 70...Bracket, 8...Handle, 80...Spindle, 81...
Extension portion, 82... Long hole, 83... Connection pin.

Claims (1)

[Claims] 1. The input side of the universal joint unit 2 is connected to the power take-off shaft 1 provided at the rear of the body a of the tractor A. A guide frame in which a holding member 6 is rotatably held on a shaft via a bearing 60, and the holding member 6 is fixed and supported on a work implement mounting frame 3 which is mounted on the rear part of a body a of a tractor A so as to be able to rise and fall freely. 7, the work implement mounting machine frame 3 is fitted so as to slide along the axial direction of the output shaft 20 and enter and exit in the front and back direction of the body a of the tractor A.
The shaft end 20a of the output shaft 20 of the universal joint unit 2 is fitted and connected to the front side of the body b of the working machine B, which is connected to the rear of the body a of the tractor A by means of a coupling frame 50 that connects with the unit frame 50. An output shaft 20 is pivotally supported by a holding member 6 that slides back and forth by the guide frame 7 in a state where the coupling frame 50 is coupled to the work implement mounting frame 3 and the input shaft 53 is mounted to be coupled to the input shaft 53. A connection and coupling device for a rotary power transmission mechanism between a tractor and a working machine, which is installed on the body b of the working machine B at a position facing the shaft end 20a of the working machine B.